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CVE-2015-2171

25
FAUCET Score

CVE-2015-2171 describes a PHP object injection vulnerability in Middleware/SessionCookie.php of the Slim framework prior to version 2.6.0. This flaw allows remote attackers to execute arbitrary PHP code by injecting crafted session data. With a CVSS score of 7.5, this vulnerability is considered highly severe due to its network-based attack vector, low attack complexity, and potential for full compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion has been observed, the potential impact remains high if exploited.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.5.0CPE matchmatch criteria
cpe:2.3:a:slimframework:slim:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.50%
Probability of exploitation in next 30 days
EPSS Percentile
83.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0250 is in the 70th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: slim/slimFixed in: 2.6.0

Vendor Advisories (1)

composerGHSA-74mf-vjpg-9xh7high

Slim vulnerable to PHP object injection

May 17, 2022

References

seclists.org / fulldisclosure/2015/Mar/16
github.com / slimphp/Slim/issues/1034
securityfocus.com / bid/70087
slimframework.com / 2015/03/01/version-260.html
Vendor Advisory